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# 2015 October 31
#
# The author disclaims copyright to this source code. In place of
# a legal notice, here is a blessing:
#
# May you do good and not evil.
# May you find forgiveness for yourself and forgive others.
# May you share freely, never taking more than you give.
#
#***********************************************************************
# This file implements regression tests for SQLite library. The
# focus of this file is testing that SQLite can follow symbolic links.
#
set testdir [file dirname $argv0]
source $testdir/tester.tcl
set testprefix symlink
# This only runs on unix.
if {$::tcl_platform(platform)!="unix"} {
finish_test
return
}
# Ensure that test.db has been created.
#
do_execsql_test 1.0 {
CREATE TABLE t1(x, y);
}
# Test that SQLite follows symlinks when opening files.
#
forcedelete test.db2
do_test 1.1 {
file link test.db2 test.db
sqlite3 db2 test.db2
sqlite3_db_filename db2 main
} [file join [pwd] test.db]
# But not with the -nofollow flag
#
do_test 1.1.2 {
db2 close
set rc [catch {sqlite3 db2 test.db2 -nofollow 1} msg]
lappend rc $msg
} {1 {unable to open database file}}
# If the main database is successfully opened with -nofollow, then -nofollow
# is also used for ATTACH.
#
do_test 1.1.3 {
catch {db2 close}
sqlite3 db2 test.db -nofollow 1
} {}
do_test 1.1.4 {
catchsql {ATTACH 'test.db2' AS aux1;} db2
} {1 {unable to open database: test.db2}}
# Test that if the symlink points to a file that does not exists, it is
# created when it is opened.
#
do_test 1.2.1 {
catch {db2 close}
db close
forcedelete test.db
file exists test.db
} 0
do_test 1.2.2 {
sqlite3 db2 test.db2
file exists test.db
} 1
do_test 1.2.3 {
sqlite3_db_filename db2 main
} [file join [pwd] test.db]
db2 close
# Test that a loop of symlinks cannot be opened.
#
do_test 1.3 {
forcedelete test.db
# Note: Tcl [file link] command is too smart to create loops of symlinks.
exec ln -s test.db2 test.db
list [catch { sqlite3 db test.db } msg] $msg
} {1 {unable to open database file}}
# Test that overly large paths cannot be opened.
#
do_test 1.4 {
set name "test.db[string repeat x 502]"
list [catch { sqlite3 db $name } msg] $msg
} {1 {unable to open database file}}
do_test 1.5 {
set r [expr 510 - [string length test.db] - [string length [pwd]]]
set name "test.db[string repeat x $r]"
list [catch { sqlite3 db $name } msg] $msg
} {1 {unable to open database file}}
#-------------------------------------------------------------------------
# Test that journal and wal files are created next to the real file,
# not the symlink.
#
do_test 2.0 {
catch { db close }
catch { db2 close }
forcedelete test.db test.db2 test.db3
sqlite3 db test.db
execsql { CREATE TABLE t1(x) }
file link test.db2 test.db
file link test.db3 test.db2
set {} {}
} {}
foreach {tn f} {1 test.db2 2 test.db3} {
do_test 2.$tn.1 {
sqlite3 db2 $f
file exists test.db-journal
} 0
do_test 2.$tn.2 {
execsql {
BEGIN;
INSERT INTO t1 VALUES(1);
} db2
file exists test.db-journal
} [expr [atomic_batch_write test.db]==0]
do_test 2.$tn.3 {
list [file exists test2.db-journal] [file exists test3.db-journal]
} {0 0}
do_test 2.$tn.4 {
execsql {
COMMIT;
PRAGMA journal_mode = wal;
INSERT INTO t1 VALUES(2);
} db2
file exists test.db-wal
} 1
do_test 2.$tn.5 {
list [file exists test2.db-wal] [file exists test3.db-wal]
} {0 0}
do_execsql_test 2.$tn.6 {
SELECT * FROM t1;
} {1 2}
db2 close
do_execsql_test 2.$tn.7 {
DELETE FROM t1;
PRAGMA journal_mode = delete;
} delete
}
# Try to open a ridiculously long pathname. Bug found by
# Kostya Serebryany using libFuzzer on 2015-11-30.
#
do_test 3.1 {
db close
catch {sqlite3 db [string repeat [string repeat x 100]/ 6]} res
set res
} {unable to open database file}
#-------------------------------------------------------------------------
# Test that relative symlinks that are not located in the cwd work.
#
do_test 4.1 {
forcedelete x y z
file mkdir x
file mkdir y
file mkdir z
sqlite3 db x/test.db
file link y/test.db ../x/test.db
file link z/test.db ../y/test.db
execsql {
PRAGMA journal_mode = wal;
CREATE TABLE t1(x, y);
INSERT INTO t1 VALUES('hello', 'world');
}
} {wal}
do_test 4.2.1 {
db close
sqlite3 db y/test.db
db eval { SELECT * FROM t1 }
} {hello world}
do_test 4.2.2 {
list [file exists x/test.db-wal] [file exists y/test.db-wal]
} {1 0}
do_test 4.3.1 {
db close
sqlite3 db z/test.db
db eval { SELECT * FROM t1 }
} {hello world}
do_test 4.3.2 {
list [file exists x/test.db-wal] [file exists y/test.db-wal] \
[file exists z/test.db-wal]
} {1 0 0}
do_test 4.4.0 {
forcedelete w
file mkdir w
file link w/test.db [file join [pwd] x/test.db]
set {} {}
} {}
do_test 4.4.1 {
db close
sqlite3 db w/test.db
db eval { SELECT * FROM t1 }
} {hello world}
do_test 4.4.2 {
list [file exists x/test.db-wal] [file exists w/test.db-wal]
} {1 0}
finish_test
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